Cosec sq 31°- tan sq 59° +( sin25°cos65°+ cos25°sin65°/3tan30°tan 45° tan60°
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here is your answer OK........
sin25 * cos65 + cos25 * sin65
= sin(90-65) * cos65 + cos(90-65) * sin65
= cos65 * cos65 + sin65 * sin65
= cos265 + sin265
= 1
OK so answer is 1
sin25 * cos65 + cos25 * sin65
= sin(90-65) * cos65 + cos(90-65) * sin65
= cos65 * cos65 + sin65 * sin65
= cos265 + sin265
= 1
OK so answer is 1
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