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

Mathematics

1 answer:

Oksana_A [137]3 years ago

8 0

Answer:

Step-by-step explanation:

cosA^2 = 1 - sinA^2

subtitute 1/4 below

= 1 - (1/4)^2

= 1 - 1/16

after calculation

= - 0.9682

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