1.

(vii) Trigonometric identities are(a) sin20 + cos20 =(b) sec20 =(c) cosec20 =​

Answer»

ANSWER:

sin²ϑ + cos²ϑ = 1

sec²ϑ = 1 + tan²ϑ

cosec²ϑ = 1 + cot²ϑ

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