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Questions

1 / 10

Time

Score

Use Product-To-Sum Formulas To Evaluate Trigonometric Functions

Use product-to-sum formulas to evaluate sin90⁰.sin60⁰

-0.27

0.55 $\frac{\sqrt{3\ }}{2}$

Use product-to-sum formulas to evaluate sin60⁰.sin30⁰

1/4

0.55

0.43

Use product-to-sum formulas to evaluate cos45⁰.cos15⁰

1/4

0.68 1/3

Use product-to-sum formulas to evaluate sin120⁰.sin30⁰

-0.88

0.55

0.43

Use product-to-sum formulas to evaluate cos120⁰.cos30⁰

-0.88

0.55 -0.43

Use product-to-sum formulas to evaluate cos90⁰.cos60⁰

-0.27

0.55

0

Use product-to-sum formulas to evaluate sin90⁰.sin30⁰

-0.88

0.55 1/2

Use product-to-sum formulas to evaluate cos60⁰.cos30⁰

1/4

0.55

0.43

Use product-to-sum formulas to evaluate cos75⁰.cos30⁰

-0.88

0.55

0.22

Use product-to-sum formulas to evaluate sin45⁰.sin15⁰

1/4

0.18 1/3

Questions

Time

Score

Use Product-To-Sum Formulas To Evaluate Trigonometric Functions

Use product-to-sum formulas to evaluate sin900.sin600

-0.27

0.55

﻿3 2\frac{\sqrt{3\ }}{2}23 ​​﻿

Use product-to-sum formulas to evaluate sin600.sin300

1/4

0.55

0.43

Use product-to-sum formulas to evaluate cos450.cos150

1/4

0.68

1/3

Use product-to-sum formulas to evaluate sin1200.sin300

-0.88

0.55

0.43

Use product-to-sum formulas to evaluate cos1200.cos300

-0.88

0.55

-0.43

Use product-to-sum formulas to evaluate cos900.cos600

-0.27

0.55

0

Use product-to-sum formulas to evaluate sin900.sin300

-0.88

0.55

1/2

Use product-to-sum formulas to evaluate cos600.cos300

1/4

0.55

0.43

Use product-to-sum formulas to evaluate cos750.cos300

-0.88

0.55

0.22

Use product-to-sum formulas to evaluate sin450.sin150

1/4

0.18

1/3

Incorrect

Great!

Use product-to-sum formulas to evaluate sin90⁰.sin60⁰

$\frac{\sqrt{3\ }}{2}$

Use product-to-sum formulas to evaluate sin60⁰.sin30⁰

Use product-to-sum formulas to evaluate cos45⁰.cos15⁰

Use product-to-sum formulas to evaluate sin120⁰.sin30⁰

Use product-to-sum formulas to evaluate cos120⁰.cos30⁰

Use product-to-sum formulas to evaluate cos90⁰.cos60⁰

Use product-to-sum formulas to evaluate sin90⁰.sin30⁰

Use product-to-sum formulas to evaluate cos60⁰.cos30⁰

Use product-to-sum formulas to evaluate cos75⁰.cos30⁰

Use product-to-sum formulas to evaluate sin45⁰.sin15⁰