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Can someone help with trig identities?
(calculators are allowed)

Can someone help with trig identities? (calculators are allowed)-example-1

1 Answer

3 votes

Answer:

d

Explanation:

cosA^2 = 1 - sinA^2

subtitute 1/4 below

= 1 - (1/4)^2

= 1 - 1/16

after calculation

= - 0.9682

User Pjanssen
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