Math, asked by AyumiKa, 9 months ago

1) If cos a=12/13 and a is in (270°,360°), then find sin2a, cos2a, tg2a, cotg2a.
2) If sina=4/5 and a is in (90°,180°), find the value of:
A=cosa+sina.tga
3) Find the value of: 2cos^2a-cos2a

Answers

Answered by dilipkumarsingh4415

0

Answer:

Step-by-step explanation:

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